| 21. | Aminophylline is a nonselective adenosine receptor antagonist and phosphodiesterase inhibitor.
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| 22. | Adenosine is an endogenous extracellular messenger that can regulate myocardial oxygen needs.
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| 23. | With respect to breathing, caffeine acts as a competitive adenosine antagonist.
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| 24. | Adenosine inhibits respiratory drive by blocking the electrical activity of respiratory neurons.
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| 25. | They release Adenosine triphosphate ( ATP ), which activate purinergic receptors.
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| 26. | In one report, PIMT was inhibited by adenosine dialdehyde.
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| 27. | This protein is associated with adenosine triphosphatases ( ATPases ).
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| 28. | This gene encodes adenosine kinase, an abundant enzyme in mammalian tissues.
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| 29. | There are currently four types of adenosine receptors found in the heart.
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| 30. | The other three adenosine receptors are involved in bone formation.
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